本任务主要目的练习UNIX/LINUX同步编程，熟悉基本的线程相关API。

任务要求

编程实现下图的效果，要求分别使用进程和线程

(1)　　进程＋SYS V信号量

(2)　　线程实现+Posix同步操作API

-The main purpose of this task exercises UNIX/LINUX synchronization programming, familiar with the basic thread-related APIs. Tasks require programming to achieve the effect of the following figure, requirements, respectively, using processes and threads (1) process+ the SYS V semaphores (2) threads to achieve synchronous operation of+Posix API